The connector IS different... But, whether the pin-out configuration is compatible with M.2 (AE-Key) adapter is yet to be explained to me. It takes a greater mind than mine to figure these things out.
Now, if you have successfully installed into the CNVI slot using a BCMxxxxx adapter in that A-E Key M.2 adapter, not only is that encouraging information, but it would give me some motivation to test it myself - as I have the same adapter in my toolbox.
I do not have the ability to test the pinout signals for these various slot types. But, plug-and-pray is a strategy I can work with.
I just want to make sure it's not going to feed power into the wrong lane.